Abstract
Sheet Breakup and Droplet Dynamics in Gasoline Spray of Multi-Hole Port Fuel Injector
Highlights
In internal combustion engines, a compact and simple combustion system is required to accomplish the demands from the accelerating electrification of automotive powertrains
Previous studies have reported about fuel injection of multi-hole nozzles, but most studies focused on the wall wetting and the thickness of the deposited liquid film [2] [3], and few studies focused on the atomization process of the fuel spray [4]
In this paper, the fuel spray from a multi-hole nozzle for port fuel injection was investigated by visualizing the sheet breakup process and analyzing the droplet dynamic characteristics by Particle Tracking Velocimetry (PTV) analysis
Summary
A compact and simple combustion system is required to accomplish the demands from the accelerating electrification of automotive powertrains. In order to achieve strict global exhaust gas regulations, further technological advances related to fuel injection are required for gasoline engines with port fuel injection. Fuel injected to the intake port becomes vapor and flows to the cylinder. Some fuel impinges over the cylinder liner and back of the valve, or flows into the cylinder as droplets and impinges on the cylinder wall [1]. Previous studies have reported about fuel injection of multi-hole nozzles, but most studies focused on the wall wetting and the thickness of the deposited liquid film [2] [3], and few studies focused on the atomization process of the fuel spray [4]. The effects of nozzle angle and differential pressure of injection on the spray atomization process and droplet dynamic characteristics after breakup were investigated
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